BUSINESS AND BASIS OF PRESENTATION	12 Months Ended
Dec. 31, 2020
BUSINESS AND BASIS OF PRESENTATION
BUSINESS AND BASIS OF PRESENTATION	NOTE 1—BUSINESS AND BASIS OF PRESENTATION Description of the business: Select Energy Services, Inc. (“we,” “Select Inc.” or “the Company”) was incorporated as a Delaware corporation on November 21, 2016. The Company is a holding company whose sole material asset consists of common units (“SES Holdings LLC Units”) in SES Holdings, LLC (“SES Holdings”). We are a leading provider of comprehensive water-management and chemical solutions to the oil and gas industry in the United States (“U.S.”). We also develop, manufacture and deliver a full suite of chemical solutions for use in oil and gas well completion and production operations. As a leader in the water solutions industry, we place the utmost importance on safe, environmentally responsible management of oilfield water throughout the lifecycle of a well. Additionally, we believe that responsibly managing water resources through our operations to help conserve and protect the environment in the communities in which we operate is paramount to our continued success. Rockwater Merger: On November 1, 2017, the Company completed a merger with Rockwater (the “Rockwater Merger”). Class A and Class B Common Stock: At December 31, 2020, the Company had both Class A and Class B common shares issued and outstanding. Holders of shares of our Class A common stock and Class B common stock are entitled to one vote per share and vote together as a single class on all matters presented to our stockholders for their vote or approval. Exchange rights: Under the Eighth Amended and Restated Limited Liability Company Agreement of SES Holdings (the “SES Holdings LLC Agreement”), SES Legacy Holdings LLC (“Legacy Owner Holdco”) and its permitted transferees have the right (an “Exchange Right”) to cause SES Holdings to acquire all or a portion of its SES Holdings LLC Units for, at SES Holdings’ election, (i) shares of Class A Common Stock at an exchange ratio of one share of Class A Common Stock for each SES Holdings LLC Unit exchanged, subject to conversion rate adjustments for stock splits, stock dividends, reclassification and other similar transactions or (ii) cash in an amount equal to the Cash Election Value (as defined within the SES Holdings LLC Agreement) of such Class A Common Stock. Alternatively, upon the exercise of any Exchange Right, Select Inc. has the right (the “Call Right”) to acquire the tendered SES Holdings LLC Units from the exchanging unitholder for, at its election, (i) the number of shares of Class A Common Stock the exchanging unitholder would have received under the Exchange Right or (ii) cash in an amount equal to the Cash Election Value of such Class A Common Stock. In connection with any exchange of SES Holdings LLC Units pursuant to an Exchange Right or Call Right, the corresponding number of shares of Class B Common Stock will be cancelled. Basis of presentation: The accompanying consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the U.S. (“GAAP”) and pursuant to the rules and regulations of the SEC. The consolidated financial statements include the accounts of the Company and all of its majority-owned or controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. For investments in subsidiaries that are not wholly owned, but where the Company exercises control, the equity held by the minority owners and their portion of net income or loss are reflected as noncontrolling interests. Investments in entities in which the Company exercises significant influence over operating and financial policies are accounted for using the equity method, and investments in entities for which the Company does not have significant control or influence are accounted for using the cost-method or other appropriate basis as applicable. As of December 31, 2020, and 2019, the Company had no equity method investees and one cost-method investee. As of December 31, 2020, the Company also had one investment in notes receivable accounted for using the amortized cost basis and one investment in publicly-traded securities accounted for using the fair value option. The Company’s investments are reviewed for impairment whenever events or circumstances indicate that the carrying value may not be recoverable. When circumstances indicate that the fair value of its investment is less than its carrying value and the reduction in value is other than temporary, the reduction in value is recognized in earnings. During the first quarter of 2018, the Company determined that its cost-method investee was no longer fully recoverable and was written down to its then estimated fair value of $0.5 million. The impairment expense of $2.0 million is included in impairment of cost-method investment within the consolidated statements of operations. Segment reporting: The Company has three reportable segments. Reportable segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and assess performance. The Company’s current reportable segments are Water Services, Water Infrastructure, and Oilfield Chemicals. The Water Services segment consists of the Company’s services businesses, including water transfer, flowback and well testing, fluids hauling, water containment and water network automation, primarily serving exploration and production (“E&P”) companies. Additionally, this segment includes the operations of our accommodations and rentals business. The Water Infrastructure segment consists of the Company’s infrastructure assets, including operations associated with our water sourcing and pipeline infrastructure, our water recycling solutions and infrastructure, and our produced water gathering systems and saltwater disposal wells, primarily serving E&P companies. The Oilfield Chemicals segment provides technical solutions and expertise related to chemical applications in the oil and gas industry. We also have significant capabilities in supplying logistics for chemical applications. We develop, manufacture and provide a full suite of chemicals used in hydraulic fracturing, stimulation, cementing, production, pipelines and well completions. With our broad chemicals product line, combined with our expertise in oilfield chemicals application, we serve pressure pumpers and major integrated and independent U.S. and international oil and gas producers. We further utilize our chemicals experience and lab testing capabilities to customize water treatment solutions tailored to the customer’s water quality and other fluid system design objectives. The results of service lines divested during 2019, including the operations of our Affirm Oilfield Services, LLC subsidiary (“Affirm”), our sand hauling operations and our Canadian operations, are combined in the “Other” category. Reclassifications: Certain reclassifications have been made to the Company’s prior period consolidated financial information to conform to the current year presentation. These presentation changes did not impact the Company’s consolidated net income, consolidated cash flows, total assets, total liabilities or total stockholders’ equity. Substantially complete liquidation: During 2019, the Company substantially completed liquidating our Canadian subsidiary and reclassified $0.4 million of cumulative translation adjustments from accumulated other comprehensive income to (losses)/gains on sales of property and equipment and divestitures, net.

BUSINESS AND BASIS OF PRESENTATION

12 Months Ended

Dec. 31, 2020

NOTE 1—BUSINESS AND BASIS OF PRESENTATION

Description of the business: Select Energy Services, Inc. (“we,” “Select Inc.” or “the Company”) was incorporated as a Delaware corporation on November 21, 2016. The Company is a holding company whose sole material asset consists of common units (“SES Holdings LLC Units”) in SES Holdings, LLC (“SES Holdings”).

We are a leading provider of comprehensive water-management and chemical solutions to the oil and gas industry in the United States (“U.S.”). We also develop, manufacture and deliver a full suite of chemical solutions for use in oil and gas well completion and production operations. As a leader in the water solutions industry, we place the utmost importance on safe, environmentally responsible management of oilfield water throughout the lifecycle of a well. Additionally, we believe that responsibly managing water resources through our operations to help conserve and protect the environment in the communities in which we operate is paramount to our continued success.

Rockwater Merger: On November 1, 2017, the Company completed a merger with Rockwater (the “Rockwater Merger”).

Class A and Class B Common Stock: At December 31, 2020, the Company had both Class A and Class B common shares issued and outstanding. Holders of shares of our Class A common stock and Class B common stock are entitled to one vote per share and vote together as a single class on all matters presented to our stockholders for their vote or approval.

Exchange rights: Under the Eighth Amended and Restated Limited Liability Company Agreement of SES Holdings (the “SES Holdings LLC Agreement”), SES Legacy Holdings LLC (“Legacy Owner Holdco”) and its permitted transferees have the right (an “Exchange Right”) to cause SES Holdings to acquire all or a portion of its SES Holdings LLC Units for, at SES Holdings’ election, (i) shares of Class A Common Stock at an exchange ratio of one share of Class A Common Stock for each SES Holdings LLC Unit exchanged, subject to conversion rate adjustments for stock splits, stock dividends, reclassification and other similar transactions or (ii) cash in an amount equal to the Cash Election Value (as defined within the SES Holdings LLC Agreement) of such Class A Common Stock. Alternatively, upon the exercise of any Exchange Right, Select Inc. has the right (the “Call Right”) to acquire the tendered SES Holdings LLC Units from the exchanging unitholder for, at its election, (i) the number of shares of Class A Common Stock the exchanging unitholder would have received under the Exchange Right or (ii) cash in an amount equal to the Cash Election Value of such Class A Common Stock. In connection with any exchange of SES Holdings LLC Units pursuant to an Exchange Right or Call Right, the corresponding number of shares of Class B Common Stock will be cancelled.

Basis of presentation: The accompanying consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the U.S. (“GAAP”) and pursuant to the rules and regulations of the SEC. The consolidated financial statements include the accounts of the Company and all of its majority-owned or controlled subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

For investments in subsidiaries that are not wholly owned, but where the Company exercises control, the equity held by the minority owners and their portion of net income or loss are reflected as noncontrolling interests. Investments in entities in which the Company exercises significant influence over operating and financial policies are accounted for using the equity method, and investments in entities for which the Company does not have significant control or influence are accounted for using the cost-method or other appropriate basis as applicable. As of December 31, 2020, and 2019, the Company had no equity method investees and one cost-method investee. As of December 31, 2020, the Company also had one investment in notes receivable accounted for using the amortized cost basis and one investment in publicly-traded securities accounted for using the fair value option. The Company’s investments are reviewed for impairment whenever events or circumstances indicate that the carrying value may not be recoverable. When

circumstances indicate that the fair value of its investment is less than its carrying value and the reduction in value is other than temporary, the reduction in value is recognized in earnings. During the first quarter of 2018, the Company determined that its cost-method investee was no longer fully recoverable and was written down to its then estimated fair value of $0.5 million. The impairment expense of $2.0 million is included in impairment of cost-method investment within the consolidated statements of operations.

Segment reporting: The Company has three reportable segments. Reportable segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and assess performance. The Company’s current reportable segments are Water Services, Water Infrastructure, and Oilfield Chemicals.

The Water Services segment consists of the Company’s services businesses, including water transfer, flowback and well testing, fluids hauling, water containment and water network automation, primarily serving exploration and production (“E&P”) companies. Additionally, this segment includes the operations of our accommodations and rentals business.

The Water Infrastructure segment consists of the Company’s infrastructure assets, including operations associated with our water sourcing and pipeline infrastructure, our water recycling solutions and infrastructure, and our produced water gathering systems and saltwater disposal wells, primarily serving E&P companies.

The Oilfield Chemicals segment provides technical solutions and expertise related to chemical applications in the oil and gas industry. We also have significant capabilities in supplying logistics for chemical applications. We develop, manufacture and provide a full suite of chemicals used in hydraulic fracturing, stimulation, cementing, production, pipelines and well completions. With our broad chemicals product line, combined with our expertise in oilfield chemicals application, we serve pressure pumpers and major integrated and independent U.S. and international oil and gas producers. We further utilize our chemicals experience and lab testing capabilities to customize water treatment solutions tailored to the customer’s water quality and other fluid system design objectives.

The results of service lines divested during 2019, including the operations of our Affirm Oilfield Services, LLC subsidiary (“Affirm”), our sand hauling operations and our Canadian operations, are combined in the “Other” category.

Reclassifications: Certain reclassifications have been made to the Company’s prior period consolidated financial information to conform to the current year presentation. These presentation changes did not impact the Company’s consolidated net income, consolidated cash flows, total assets, total liabilities or total stockholders’ equity.

Substantially complete liquidation: During 2019, the Company substantially completed liquidating our Canadian subsidiary and reclassified $0.4 million of cumulative translation adjustments from accumulated other comprehensive income to (losses)/gains on sales of property and equipment and divestitures, net.